package keeper import ( "fmt" "github.com/cosmos/cosmos-sdk/codec" "github.com/cosmos/cosmos-sdk/store/prefix" sdk "github.com/cosmos/cosmos-sdk/types" "github.com/cosmos/cosmos-sdk/x/params/subspace" "github.com/kava-labs/kava/x/cdp/types" ) // Keeper keeper for the cdp module type Keeper struct { key sdk.StoreKey cdc *codec.Codec paramSubspace subspace.Subspace pricefeedKeeper types.PricefeedKeeper supplyKeeper types.SupplyKeeper auctionKeeper types.AuctionKeeper accountKeeper types.AccountKeeper maccPerms map[string][]string } // NewKeeper creates a new keeper func NewKeeper(cdc *codec.Codec, key sdk.StoreKey, paramstore subspace.Subspace, pfk types.PricefeedKeeper, ak types.AuctionKeeper, sk types.SupplyKeeper, ack types.AccountKeeper, maccs map[string][]string) Keeper { if !paramstore.HasKeyTable() { paramstore = paramstore.WithKeyTable(types.ParamKeyTable()) } return Keeper{ key: key, cdc: cdc, paramSubspace: paramstore, pricefeedKeeper: pfk, auctionKeeper: ak, supplyKeeper: sk, accountKeeper: ack, maccPerms: maccs, } } // CdpDenomIndexIterator returns an sdk.Iterator for all cdps with matching collateral denom func (k Keeper) CdpDenomIndexIterator(ctx sdk.Context, collateralType string) sdk.Iterator { store := prefix.NewStore(ctx.KVStore(k.key), types.CdpKeyPrefix) db, found := k.GetCollateralTypePrefix(ctx, collateralType) if !found { panic(fmt.Sprintf("denom %s prefix not found", collateralType)) } return sdk.KVStorePrefixIterator(store, types.DenomIterKey(db)) } // CdpCollateralRatioIndexIterator returns an sdk.Iterator for all cdps that have collateral denom // matching denom and collateral:debt ratio LESS THAN targetRatio func (k Keeper) CdpCollateralRatioIndexIterator(ctx sdk.Context, collateralType string, targetRatio sdk.Dec) sdk.Iterator { store := prefix.NewStore(ctx.KVStore(k.key), types.CollateralRatioIndexPrefix) db, found := k.GetCollateralTypePrefix(ctx, collateralType) if !found { panic(fmt.Sprintf("denom %s prefix not found", collateralType)) } return store.Iterator(types.CollateralRatioIterKey(db, sdk.ZeroDec()), types.CollateralRatioIterKey(db, targetRatio)) } // IterateAllCdps iterates over all cdps and performs a callback function func (k Keeper) IterateAllCdps(ctx sdk.Context, cb func(cdp types.CDP) (stop bool)) { store := prefix.NewStore(ctx.KVStore(k.key), types.CdpKeyPrefix) iterator := sdk.KVStorePrefixIterator(store, []byte{}) defer iterator.Close() for ; iterator.Valid(); iterator.Next() { var cdp types.CDP k.cdc.MustUnmarshalBinaryLengthPrefixed(iterator.Value(), &cdp) if cb(cdp) { break } } } // IterateCdpsByCollateralType iterates over cdps with matching denom and performs a callback function func (k Keeper) IterateCdpsByCollateralType(ctx sdk.Context, collateralType string, cb func(cdp types.CDP) (stop bool)) { iterator := k.CdpDenomIndexIterator(ctx, collateralType) defer iterator.Close() for ; iterator.Valid(); iterator.Next() { var cdp types.CDP k.cdc.MustUnmarshalBinaryLengthPrefixed(iterator.Value(), &cdp) if cb(cdp) { break } } } // IterateCdpsByCollateralRatio iterate over cdps with collateral denom equal to denom and // collateral:debt ratio LESS THAN targetRatio and performs a callback function. func (k Keeper) IterateCdpsByCollateralRatio(ctx sdk.Context, collateralType string, targetRatio sdk.Dec, cb func(cdp types.CDP) (stop bool)) { iterator := k.CdpCollateralRatioIndexIterator(ctx, collateralType, targetRatio) defer iterator.Close() for ; iterator.Valid(); iterator.Next() { _, id, _ := types.SplitCollateralRatioKey(iterator.Key()) cdp, found := k.GetCDP(ctx, collateralType, id) if !found { panic(fmt.Sprintf("cdp %d does not exist", id)) } if cb(cdp) { break } } }